DERIVATIVE INSTRUMENTS AND OFFSETTING ASSETS AND LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Forward Commitments [Member]
Derivative [Line Items]
Notional amount	$ 255,200	$ 256,800
Difference in carrying value and fair value, reflecting a loss	1,800	1,500
Loan/Lease Interest Rate Swaps [Member]
Derivative [Line Items]
Notional amount	$ 243,200	$ 309,100
Average maturity	39 months	46 months
Average interest receive rate	2.70%	2.50%
Average interest pay rate	5.60%	5.60%
Fixed Rate Mortgages [Member]
Derivative [Line Items]
Notional amount	$ 216,500	$ 174,800
Difference in carrying value and fair value, reflecting a gain	$ 6,400	$ 5,200